Artificial carrier particles and method for preparation thereof
CA 2000547 C · Owner: Ihara, Hirotaka · Inventors: Saisho, Munehiro; Fuzita, Haruo; Hirai, Takenori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An artificial carrier particle comprising an anionic polymer and a synthetic polyamino acid having at least one carboxylic group and at least one amino group in its side chain the complex being, insolubilized by an aldehyde crosslinking agent. The artificial carrier particle is useful in immunoassay in particular, particle, immunoassay. The artificial carrier particles are obtained by preparing an aqueous solution containing an anionic polymer and a synthetic polyamino acid comprising at least one free carboxyl group and at least one free amino group in its side chain adjusting the pH, of the solution to 3.5 to 9.5 at room temperature or at progressively increasing temperature under …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 12, 1989 and granted November 5, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.